diff options
| author | Paul E. McKenney <paulmck@kernel.org> | 2024-10-30 17:10:22 -0700 |
|---|---|---|
| committer | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2024-12-14 17:04:55 +0100 |
| commit | ec9d6356bfda69abe5f4767dd56c964127913233 (patch) | |
| tree | 97840d114f071580f15537038f4a975c9cac17c5 /kernel/rcu/Kconfig.debug | |
| parent | 16338e7cb7450574ae3a210db6f35280fc44e50e (diff) | |
rcutorture: Make rcutorture_one_extend() check reader state
This commit adds reader-state debugging checks to a new function named
rcutorture_one_extend_check(), which is invoked before and after setting
new reader states by the existing rcutorture_one_extend() function.
These checks have proven to be rather heavyweight, reducing reproduction
rate of some failures by a factor of two. They are therefore hidden
behind a new RCU_TORTURE_TEST_CHK_RDR_STATE Kconfig option.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Tested-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Diffstat (limited to 'kernel/rcu/Kconfig.debug')
| -rw-r--r-- | kernel/rcu/Kconfig.debug | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug index b3ac000004bf..6af90510a1ca 100644 --- a/kernel/rcu/Kconfig.debug +++ b/kernel/rcu/Kconfig.debug @@ -53,6 +53,22 @@ config RCU_TORTURE_TEST Say M if you want the RCU torture tests to build as a module. Say N if you are unsure. +config RCU_TORTURE_TEST_CHK_RDR_STATE + tristate "Check rcutorture reader state" + depends on RCU_TORTURE_TEST + default n + help + This option causes rcutorture to check the desired rcutorture + reader state for each segment against the actual context. + Note that PREEMPT_COUNT must be enabled if the preempt-disabled + and bh-disabled checks are to take effect, and that PREEMPT_RCU + must be enabled for the RCU-nesting checks to take effect. + These checks add overhead, and this Kconfig options is therefore + disabled by default. + + Say Y here if you want rcutorture reader contexts checked. + Say N if you are unsure. + config RCU_TORTURE_TEST_LOG_CPU tristate "Log CPU for rcutorture failures" depends on RCU_TORTURE_TEST |